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Nuclear Power Plants

Switzerland has five nuclear power plants: Beznau I & II, Mühleberg, Gösgen and Leibstadt. In addition to the nuclear power plants, three research reactors are in operation: at the Paul Scherrer Institute in Würenlingen, the Swiss Federal Institute of Technology (ETH) in Lausanne and the University of Basel. And finally, the national central interim storage facility for radioactive waste (ZWILAG) at Würenlingen is also monitored by ENSI.

 

 

Top Article

  • Background articles, News, Posts

    All Swiss nuclear power plants comply with the updated earthquake safety standards

    For the second time since the Fukushima accident in 2011, power plant operators have demonstrated that their plants are capable of withstanding an extremely rare, severe earthquake. The safety case for a flood caused by an earthquake has also been checked. The findings from the safety proofs generated in the aftermath of Fukushima have been…

    Beznau Nuclear Power Plant, Earthquakes, Flooding, Fukushima, Gösgen Nuclear Power Plant, Leibstadt Nuclear Power Plant, Mühleberg Nuclear Power Plant, Nuclear Facilities
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News

  • News, Posts

    2023 Oversight Report: The safety status of the nuclear power plants is good

    ENSI verified the status of the Swiss nuclear power plants by 327 inspections. In 2023, the year under review, 22 reportable nuclear-safety-relevant incidents were recorded at the nuclear power plants. ENSI provides detailed information in the oversight report published today.

    Annual reports, Beznau Nuclear Power Plant, Documents, ENSI, Events, Gösgen Nuclear Power Plant, Leibstadt Nuclear Power Plant, Nuclear Facilities, Nuclear Power Plants
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  • Delegation der spanischen Aufsichtsbehörde.
    News, Posts

    The Spanish regulatory authority and ENSI in talks on radiation protection

    From 6 to 8 May 2024, a delegation from the Spanish regulatory authority visited ENSI. Discussions focused on the topic of radiation protection, in particular exchanging of experience relating to the Leibstadt NPP and to the Mühleberg NPP, which is currently being dismantled.

    Bilateral Cooperation, ENSI, International, International Affairs, Leibstadt Nuclear Power Plant, Mühleberg Nuclear Power Plant, Radiation Protection
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  • KKB Beznau
    News, Posts

    Leibstadt and Beznau nuclear power plants can withstand infrequent severe earthquakes

    Both Leibstadt and Beznau nuclear power plants have shown that, in the event of or after a very severe earthquake, they can ensure that their reactors are stable and safe. Dose values of one or 100 millisievert which have to be complied with will not be exceeded even after earthquakes that are only to be…

    Beznau Nuclear Power Plant, Earthquakes, Gösgen Nuclear Power Plant, Leibstadt Nuclear Power Plant, Mühleberg Nuclear Power Plant, Nuclear Facilities, Nuclear Power Plants
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  • News, Posts

    WENRA’s statement on the importance of nuclear safety in the context of the current energy crisis

    At its November 2022 plenary meeting, WENRA discussed the consequences of the current energy crisis on regulatory activities and issued a statement which highlights the importance of nuclear safety in this new challenging context.

    ENSI, International, International Affairs, Nuclear Power Plants
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  • Background articles, News, Posts

    All Swiss nuclear power plants comply with the updated earthquake safety standards

    For the second time since the Fukushima accident in 2011, power plant operators have demonstrated that their plants are capable of withstanding an extremely rare, severe earthquake. The safety case for a flood caused by an earthquake has also been checked. The findings from the safety proofs generated in the aftermath of Fukushima have been…

    Beznau Nuclear Power Plant, Earthquakes, Flooding, Fukushima, Gösgen Nuclear Power Plant, Leibstadt Nuclear Power Plant, Mühleberg Nuclear Power Plant, Nuclear Facilities
    Read More
  • News, Posts

    IAEA Director General receives an insight into Swiss backfitting philosophy

    ENSI experts gave the Head of the International Atomic Energy Agency (IAEA), Rafael Grossi, a guided tour of the Beznau nuclear power plant during a working visit to Switzerland. Grossi was given a picture of the continuous improvements made to nuclear safety as laid down in the Vienna Declaration, in the setting of the Beznau…

    Beznau Nuclear Power Plant, ENSI, International, International Affairs
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More News

Background Articles

  • Background articles, Posts

    Series of articles on barriers 6/6: The containment holds radioactive substances in the reactor building

    The reactor pressure vessel is enclosed by the containment as the third barrier. This consists of a steel primary containment and a concrete secondary containment.

    Barrier Principle, Defense in depth, ENSI, Nuclear Power Plants, Nuclear Safety and Security, Radiation Protection, Security
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  • Background articles, Posts

    Series of articles on barriers 5/6: The water circuit (primary circuit part 2 of 2)

    With its pipelines, shut-off valves and other components, the cooling circuit, together with the reactor pressure vessel, is the second barrier for trapping radioactive substances.

    Barrier Principle, Defense in depth, ENSI, Nuclear Power Plants, Nuclear Safety and Security, Radiation Protection, Security
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  • Background articles, Posts

    Series of articles on barriers 4/6: The reactor pressure vessel (primary circuit part 1 of 2)

    The reactor pressure vessel, together with the water’s cooling circuit, is the second barrier for trapping radioactive substances.

    Barrier Principle, Defense in depth, ENSI, Nuclear Power Plants, Nuclear Safety and Security, Radiation Protection, Security
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Documents

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